02/01/2024
SETUP MATTERS! I can’t say this enough. When it comes to any exercise, but especially free weight exercises, set up and GRAVITY determine what muscles work the hardest!
As I hope ALL of you know, gravity pulls things straight down here on Earth.
When you look at the top video, gravity is pulling the dumbbell down out of my hand, forcing my bicep to RESIST gravity and the weight of the dumbbell. Although the shoulder is technically moving and rotating, this is an ISOMETRIC BICEP exercise and does NOT do a good job of working the rotators of the shoulder.
(Side note: if you were to hold onto a band or a cable and perform this same movement, it would be more similar to the bottom video and a GOOD way to target the shoulders!)
In the bottom video, again gravity wants to pull the dumbbell straight down. But because of the angle of my arm, the rotators of the shoulder must RESIST gravity and the weight of the dumbbell. Because of this, this option can be a good way to warm up the shoulders.
Take it or leave it, it’s up to you, try it out for yourself!